Vulnerability in Linux Kernel
CVE-2015-7513
arch/x86/kvm/x86.c in the Linux kernel before 4.4 does not reset the PIT counter values during state restoration, which allows guest OS users to cause a denial of service (divide-by-zero error and host OS crash) via a zero value, related to the kvm_vm_ioctl_set_pit and kvm_vm_ioctl_set_pit2 functions.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (44.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Linux Kernel — versions 4.4
- Canonical Ubuntu Linux — versions 12.04, 14.04, 15.04
- Debian Linux — versions 7.0, 8.0
- Fedoraproject Fedora — versions 22, 23
Weakness classification (CWE)
References
- www.openwall.com/lists/oss-security/2016/01/07/2 (mailing-list, Patch, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2016-January/175792.html (vendor-advisory, Third Party Advisory)
- www.ubuntu.com/usn/USN-2887-2 (vendor-advisory, Third Party Advisory)
- github.com/torvalds/linux/commit/0185604c2d82c560dab2f2933a18f797e74ab5a8 (Patch, Third Party Advisory)
- www.ubuntu.com/usn/USN-2886-1 (vendor-advisory, Third Party Advisory)
- www.ubuntu.com/usn/USN-2887-1 (vendor-advisory, Third Party Advisory)
- www.ubuntu.com/usn/USN-2890-3 (vendor-advisory, Third Party Advisory)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- www.ubuntu.com/usn/USN-2889-1 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2016-January/176194.html (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2015-7513?
- CVE-2015-7513 is a medium-severity vulnerability in Linux Kernel, classified under Divide By Zero. CVSS score: 6.5/10. Published 2016-02-08.
- How severe is CVE-2015-7513?
- Medium severity. CVSS v3 base score is 6.5 out of 10.